Phytoremediation of Arsenic and Lead in Contaminated Soil Using Chinese Brake Ferns (Pteris vittata) and Indian Mustard (Brassica juncea)
Phytoremediation of Arsenic and Lead in Contaminated Soil Using Chinese Brake Ferns (Pteris vittata) and Indian Mustard (Brassica juncea)
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DOI：
10.1080/713610173
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发表时间：
2003-04
影响因子：
3.7
通讯作者：
A. Salido;Kelly L Hasty;Jae-Min Lim;D. Butcher
中科院分区：
文献类型：
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作者：
A. Salido;Kelly L Hasty;Jae-Min Lim;D. Butcher
在美国环保署超级基金项目（巴伯果园），进行了田间和温室试验，以评估植物修复砷和铅污染土壤的性能。以蕨菜为原料提取砷。平均而言，蕨类植物芽砷浓度高达20倍的土壤砷浓度在现场条件下。据估计，将需要8年的时间，以减少土壤砷的酸可提取部分的安全水平（40毫克/公斤）。土壤pH值对砷提取的影响也进行了研究。结果表明，提高土壤pH值可以提高砷的去除。印度芥菜植物（芥菜）在温室条件下，植物提取土壤铅。EDTA被施加到土壤中，并发现提高铅提取。当EDTA浓度为10 mmol EDTA/kg土时，在土壤中Pb含量为338 mg/kg土时，芥菜提取的Pb约为32 mg。总之，植物修复将是一个合适的替代传统的补救技术，特别是对土壤，不需要立即补救。
Field and greenhouse experiments were performed to assess the performance of phytoremediation of arsenic and lead from contaminated soil at an EPA Superfund site (Barber Orchard). Chinese Brake ferns (Pteris vittata) were used to extract arsenic. On average, fern shoot arsenic concentrations were as high as 20 times the soil arsenic concentrations under field conditions. It was estimated that 8 years would be required to reduce the acid-extractable portion of soil arsenic to safe levels (40 mg/kg). The effect of soil pH on arsenic extraction was also investigated. Results indicate that increasing soil pH may improve arsenic removal. Indian mustard plants (Brassica juncea) were used under greenhouse conditions to phytoextract soil lead. EDTA was applied to soil and was found to improve lead extraction. When the EDTA concentration was 10 mmol EDTA/kg soil in soil containing 338 mg Pb/kg soil, mustard plants extracted approximately 32 mg of lead. In conclusion, phytoremediation would be a suitable alternative to conventional remediation techniques, especially for soils that do not require immediate remediation.